teefilterseditor.pas

第三方控件：PaintGrid.pas 网格型仪表控件源文件 Mymeter.pas 圆型仪表控件源文件 Project1是这两个控件的使用范例。 该

    rgb.rgbtGreen:=RoundColor2(Hue);
    rgb.rgbtBlue:=RoundColor2(Hue-HLSMAXDiv3);
  end;
end;

{ TRedFilter }
procedure TRedFilter.Apply(const R: TRect);
var x,y : Integer;
    tmp : Single;
    tmpFloat : Single;
    tmpInt   : Integer;
begin
  inherited;

  if FPercent then
  begin
    tmp:=FAmount*0.01;

    for y:=R.Top to R.Bottom do
        for x:=R.Left to R.Right do
        with Lines[y,x] do
        begin
          tmpFloat:=rgbtRed+rgbtRed*tmp;
          if (tmpFloat<0) then rgbtRed:=0
          else
          if (tmpFloat>255) then rgbtRed:=255
          else
            rgbtRed:=Round(tmpFloat);
        end;
  end
  else
  for y:=R.Top to R.Bottom do
      for x:=R.Left to R.Right do
      with Lines[y,x] do
      begin
        tmpInt:=rgbtRed+FAmount;
        if (tmpInt<0) then rgbtRed:=0
        else
        if (tmpInt>255) then rgbtRed:=255
        else
          rgbtRed:=tmpInt;
        end;
end;

class function TRedFilter.Description: String;
begin
  result:='Red';
end;

{ TGreenFilter }

procedure TGreenFilter.Apply(const R: TRect);
var x,y : Integer;
    tmp : Single;
    tmpFloat : Single;
    tmpInt   : Integer;
begin
  inherited;

  if FPercent then
  begin
    tmp:=FAmount*0.01;

    for y:=R.Top to R.Bottom do
        for x:=R.Left to R.Right do
        with Lines[y,x] do
        begin
          tmpFloat:=rgbtGreen+rgbtGreen*tmp;
          if (tmpFloat<0) then rgbtGreen:=0
          else
          if (tmpFloat>255) then rgbtGreen:=255
          else
            rgbtGreen:=Round(tmpFloat);
        end;
  end
  else
  for y:=R.Top to R.Bottom do
      for x:=R.Left to R.Right do
      with Lines[y,x] do
      begin
        tmpInt:=rgbtGreen+FAmount;
        if (tmpInt<0) then rgbtGreen:=0
        else
        if (tmpInt>255) then rgbtGreen:=255
        else
          rgbtGreen:=tmpInt;
      end;
end;

class function TGreenFilter.Description: String;
begin
  result:='Green';
end;

{ TBlueFilter }

procedure TBlueFilter.Apply(const R: TRect);
var x,y : Integer;
    tmp : Single;
    tmpFloat : Single;
    tmpInt   : Integer;
begin
  inherited;

  if FPercent then
  begin
    tmp:=FAmount*0.01;

    for y:=R.Top to R.Bottom do
        for x:=R.Left to R.Right do
        with Lines[y,x] do
        begin
          tmpFloat:=rgbtBlue+rgbtBlue*tmp;
          if (tmpFloat<0) then rgbtBlue:=0
          else
          if (tmpFloat>255) then rgbtBlue:=255
          else
            rgbtBlue:=Round(tmpFloat);
        end;
  end
  else
  for y:=R.Top to R.Bottom do
      for x:=R.Left to R.Right do
      with Lines[y,x] do
      begin
        tmpInt:=rgbtBlue+FAmount;
        if (tmpInt<0) then rgbtBlue:=0
        else
        if (tmpInt>255) then rgbtBlue:=255
        else
          rgbtBlue:=tmpInt;
      end;
end;

class function TBlueFilter.Description: String;
begin
  result:='Blue';
end;

{ TConvolveFilter }
constructor TConvolveFilter.Create(Collection:TCollection);
const
  Inv9=1.0/9.0;
begin
  inherited;
  InvTotalWeight:=Inv9;
end;

procedure TConvolveFilter.CalcWeightsFor(x:Integer);
begin
end;

procedure TConvolveFilter.Apply(const R:TRect);
var f2  : TFilter;
    x,y,
    tmp : Integer;
begin
  inherited;

  InvTotalWeight:=1.0 / ( Weights[-1,-1]+Weights[-1, 0]+Weights[-1, 1]+
                          Weights[ 0,-1]+Weights[ 0, 0]+Weights[ 0, 1]+
                          Weights[ 1,-1]+Weights[ 1, 0]+Weights[ 1, 1] ) ;

  Prev:=Lines[0];
  This:=Lines[1];

  f2:=TFilter.Create(nil);
  try
    f2.Bitmap:=TBitmap.Create;

    {$IFDEF D10}
    f2.Bitmap.SetSize(Bitmap.Width,Bitmap.Height);
    {$ELSE}
    f2.Bitmap.Width:=Bitmap.Width;
    f2.Bitmap.Height:=Bitmap.Height;
    {$ENDIF}

    f2.CalcLines;

    for y:=R.Top+1 to R.Bottom-2 do
    begin
      Next:=Lines[y+1];

      for x:=R.Left+1 to R.Right-2 do
      with f2.Lines[y,x] do
      begin
        CalcWeightsFor(x);

        tmp:=Round(
                  (
                   (Weights[-1,-1]*Prev[x-1].rgbtBlue)+
                   (Weights[-1, 0]*Prev[x].rgbtBlue)+
                   (Weights[-1, 1]*Prev[x+1].rgbtBlue)+
                   (Weights[ 0,-1]*This[x-1].rgbtBlue)+
                   (Weights[ 0, 0]*This[x].rgbtBlue)+
                   (Weights[ 0, 1]*This[x+1].rgbtBlue)+
                   (Weights[ 1,-1]*Next[x-1].rgbtBlue)+
                   (Weights[ 1, 0]*Next[x].rgbtBlue)+
                   (Weights[ 1, 1]*Next[x+1].rgbtBlue)
                  )*InvTotalWeight
                   );

        if tmp>255 then tmp:=255 else if tmp<0 then tmp:=0;
        rgbtBlue:=tmp;

        tmp:=Round(
                  (
                   (Weights[-1,-1]*Prev[x-1].rgbtGreen)+
                   (Weights[-1, 0]*Prev[x].rgbtGreen)+
                   (Weights[-1, 1]*Prev[x+1].rgbtGreen)+
                   (Weights[ 0,-1]*This[x-1].rgbtGreen)+
                   (Weights[ 0, 0]*This[x].rgbtGreen)+
                   (Weights[ 0, 1]*This[x+1].rgbtGreen)+
                   (Weights[ 1,-1]*Next[x-1].rgbtGreen)+
                   (Weights[ 1, 0]*Next[x].rgbtGreen)+
                   (Weights[ 1, 1]*Next[x+1].rgbtGreen)
                  )*InvTotalWeight
                   );

        if tmp>255 then tmp:=255 else if tmp<0 then tmp:=0;
        rgbtGreen:=tmp;

        tmp:=Round(
                  (
                   (Weights[-1,-1]*Prev[x-1].rgbtRed)+
                   (Weights[-1, 0]*Prev[x].rgbtRed)+
                   (Weights[-1, 1]*Prev[x+1].rgbtRed)+
                   (Weights[ 0,-1]*This[x-1].rgbtRed)+
                   (Weights[ 0, 0]*This[x].rgbtRed)+
                   (Weights[ 0, 1]*This[x+1].rgbtRed)+
                   (Weights[ 1,-1]*Next[x-1].rgbtRed)+
                   (Weights[ 1, 0]*Next[x].rgbtRed)+
                   (Weights[ 1, 1]*Next[x+1].rgbtRed)
                  )*InvTotalWeight
                   );

        if tmp>255 then tmp:=255 else if tmp<0 then tmp:=0;
        rgbtRed:=tmp;
      end;

      Prev:=This;
      This:=Next;
    end;

    // Copy rectangle to destination bitmap
    for y:=R.Top to R.Bottom do
        for x:=R.Left to R.Right do
            Lines[y,x]:=f2.Lines[y,x];
  finally
    f2.Free;
  end;
end;

{ TSharpenFilter }

procedure TSharpenFilter.Apply(const R: TRect);
const Center=2.0;
      Pix=-((Center-1)/8.0);
begin
  Weights[-1,-1]:=Pix;  Weights[-1,0]:=Pix;    Weights[-1,1]:=Pix;
  Weights[ 0,-1]:=Pix;  Weights[ 0,0]:=Center; Weights[ 0,1]:=Pix;
  Weights[ 1,-1]:=Pix;  Weights[ 1,0]:=Pix;    Weights[ 1,1]:=Pix;

  InvTotalWeight:=1.0/16.0;

  inherited;
end;

class function TSharpenFilter.Description: String;
begin
  result:='Sharpen';
end;

{ TBlurFilter }

procedure TBlurFilter.Apply(const R: TRect);
begin
  Weights[-1,-1]:=1; Weights[-1,0]:=2; Weights[-1,1]:=1;
  Weights[ 0,-1]:=2; Weights[ 0,0]:=4; Weights[ 0,1]:=2;
  Weights[ 1,-1]:=1; Weights[ 1,0]:=2; Weights[ 1,1]:=1;

  InvTotalWeight:=1.0/16;
  inherited;
end;

class function TBlurFilter.Description: String;
begin
  result:='Blur';
end;

{ TGammaCorrectionFilter }
constructor TGammaCorrectionFilter.Create(Collection:TCollection);
begin
  inherited;
  FAmount:=70;
  IOnlyPositive:=True;
end;

procedure TGammaCorrectionFilter.Apply(const R: TRect);
var t,
    x,y    : Integer;
    IGamma : Array[0..255] of Byte;
    tmp    : Single;
begin
  inherited;

  tmp:=Max(0.001,Abs(Amount)*0.01);

  IGamma[0]:=0;
  for t:=1 to 255 do
      IGamma[t]:=Round(Exp(Ln(t/255.0)/tmp)*255.0);

  for y:=R.Top to R.Bottom do
    for x:=R.Left to R.Right do
    with Lines[y,x] do
    begin
      rgbtRed:=IGamma[rgbtRed];
      rgbtGreen:=IGamma[rgbtGreen];
      rgbtBlue:=IGamma[rgbtBlue];
    end;
end;

class function TGammaCorrectionFilter.Description: String;
begin
  result:='Gamma correction';
end;

{ TFilterItems }

function TFilterItems.Get(Index: Integer): TFilter;
begin
  result:=TFilter(GetItem(Index));
end;

procedure TFilterItems.Put(Index: Integer; const Value: TFilter);
begin
  SetItem(Index,Value);
end;

{$IFNDEF D7}
{$IFNDEF CLR}
type
  TOwnedCollectionAccess=class(TOwnedCollection);
{$ENDIF}

function TFilterItems.Owner:TObject;
begin
  result:=GetOwner;
end;
{$ENDIF}

procedure TFilterItems.Update(Item: TCollectionItem);
begin
  inherited;

  // Preview

  FreeAndNil(TFilters(Owner).FBitmap);
end;

{ TFilters }
constructor TFilters.Create(AOwner: TComponent);
begin
  inherited;
  FItems:=TFilterItems.Create(Self,TFilter);
end;

destructor TFilters.Destroy;
begin
  FItems.Free;
  FBitmap.Free;
  inherited;
end;

function TFilters.ApplyFilters(const R:TRect): TBitmap;
var t : Integer;
begin
  with Panel do
       result:=TeeCreateBitmap(Color,R,TeePixelFormat);

  for t:=0 to Items.Count-1 do
  with Items[t] do
  if not Disabled then
  begin
    Bitmap:=result;
    Apply;
  end;
end;

function TFilters.Bitmap: TBitmap;
begin
  if not Assigned(FBitmap) then
     FBitmap:=ApplyFilters(Panel.GetRectangle);

  result:=FBitmap;
end;

procedure TFilters.StretchTo(Picture:TPicture; AWidth,AHeight:Integer);
var tmpDest : TBitmap;
begin
  tmpDest:=TBitmap.Create;
  try
    {$IFDEF D10}
    tmpDest.SetSize(AWidth,AHeight);
    {$ELSE}
    tmpDest.Width:=AWidth;
    tmpDest.Height:=AHeight;
    {$ENDIF}

    SmoothStretch(Bitmap,tmpDest);
    Picture.Assign(tmpDest);
  finally
    tmpDest.Free;
  end;
end;

procedure TFilters.SetItems(const Value: TFilterItems);
begin
  FItems.Assign(Value);
  FreeAndNil(FBitmap);
end;

{ TEmbossFilter }

procedure TEmbossFilter.Apply(const R: TRect);
begin
  Weights[-1,-1]:= 0;  Weights[-1,0]:=-1;    Weights[-1,1]:=0;
  Weights[ 0,-1]:=-1;  Weights[ 0,0]:=1;     Weights[ 0,1]:=1;
  Weights[ 1,-1]:= 0;  Weights[ 1,0]:=-1;    Weights[ 1,1]:=0;

  InvTotalWeight:=1.0/1.0;

  inherited;
end;

class function TEmbossFilter.Description: String;
begin
  result:='Emboss';
end;

{ TContrastFilter }

procedure TContrastFilter.Apply(const R: TRect);
var x,y,l :  Integer;
    IPercent : Single;
begin
  inherited;

  if Percent then
     IPercent:=FAmount*0.01
  else
     IPercent:=1;

  for y:=R.Top to R.Bottom do
      for x:=R.Left to R.Right do
      with Lines[y,x] do
      begin
        if Percent then l:=rgbtRed+(Round(rgbtRed*IPercent)*(rgbtRed-128) div 256)
                   else l:=rgbtRed+(Amount*(rgbtRed-128) div 256);

        if l<0 then rgbtRed:=0 else if l>255 then rgbtRed:=255 else rgbtRed:=l;

        if Percent then l:=rgbtGreen+(Round(rgbtGreen*IPercent)*(rgbtGreen-128) div 256)
                   else l:=rgbtGreen+(Amount*(rgbtGreen-128) div 256);

        if l<0 then rgbtGreen:=0 else if l>255 then rgbtGreen:=255 else rgbtGreen:=l;

        if Percent then l:=rgbtBlue+(Round(rgbtBlue*IPercent)*(rgbtBlue-128) div 256)
                   else l:=rgbtBlue+(Amount*(rgbtBlue-128) div 256);

        if l<0 then rgbtBlue:=0 else if l>255 then rgbtBlue:=255 else rgbtBlue:=l;
      end;
end;

class function TContrastFilter.Description: String;
begin
  result:='Contrast';
end;

{ TAntiAliasFilter }

procedure TAntiAliasFilter.Apply(const R: TRect);
begin
  Weights[-1,-1]:=0;  Weights[-1,0]:=0;    Weights[-1,1]:=0;
  Weights[ 0,-1]:=0;  Weights[ 0,0]:=1;    Weights[ 0,1]:=1;
  Weights[ 1,-1]:=0;  Weights[ 1,0]:=1;    Weights[ 1,1]:=1;

  InvTotalWeight:=1.0/4.0;

  inherited;
end;

class function TAntiAliasFilter.Description: String;
begin
  result:='Antialias';
end;

procedure TFiltersEditor.Scaled1Click(Sender: TObject);
begin
  Scaled1.Checked:=not Scaled1.Checked;
  Preview;
end;

initialization
  //RegisterComponents(TeeMsg_TeeChartPalette,[TFilters]);

  TeeRegisterFilters([ TInvertFilter,
                       TGrayScaleFilter,
                       TMosaicFilter,
                       TFlipFilter,
                       TReverseFilter,
                       TBrightnessFilter,
                       TContrastFilter,
                       TRedFilter,
                       TGreenFilter,
                       TBlueFilter,
                       TBlurFilter,
                       TSharpenFilter,
                       TGammaCorrectionFilter,
                       TEmbossFilter,
                       TAntiAliasFilter ]);

  InstallHook;
finalization
  FreeAndNil(FilterClass);
  RemoveHook;
end.